Colloids

Constant Potential (Deryaguin)

(36)

(37)

Linear Superposition (Debye-Huckel)

(38)

(39)

Superposition (thin double layer)

(40)

(41)

Electrokinetic Phenomena

Electrokinetic phenomena occur when there is relative motion between the charged interface and the adjacent electrolyte solution so that part of the double layer charge moves with the liquid. The "plane of shear" separates the mobile part of the double layer from the fixed part. The electrical potential at the shear plane is the electrokinetic potential or the zeta potential (-potential).